| 摘要: | 論文的工作主要是利用Meade 10” 望遠鏡和羅賽達濾鏡 ( Rosetta filter set ) 在中央大學鹿林山上對於彗星2001 A2（LINEAR）的光度觀測. 這組羅賽達濾鏡包括六個濾鏡, 其中有四個濾鏡是用以測量發射譜線（CN, C2, C3 and NH2）, 另外兩個濾鏡則為連續譜 ( BC and RC ). 我們觀測標準星 ( 包括流量型和太陽類型的標準星 ) 並將每個濾鏡所相對應的流量計算出來, 再利用Haser Model 擬合彗星氣體分子的光變曲線, 最終計算得到彗髮中氣體分子的分子產生率. 我們將所得數據與Schleicher 所量測的值比較後, 得到近似的結果! 此外, 我們也將觀測標準星所求出的星等色指數與同樣使用同一組濾鏡觀測的 Dr. Bonev 觀測資料做比較, 也幾乎完全符合! 這顯示著鹿林山天文台的觀測條件是不錯的！ 未來, 我們將以這套彗星系統為基礎, 而鹿林山天文台的地理位置正可以使得全球彗星觀測網得以補足, 持續性對彗星做長時間觀測、追蹤,以更進一步瞭解彗星的結構、組成. Scientific study of cometary morphology and outgassing behaviors requires precise photometric measurements of the fluxes of the optical emissions of the gas comas and dust tails. To initiate such an observational program, we built a robotic remote control system for a Meade 10" telescope on Lu-Lin to observe Comet 2001 A2 (LINEAR) between June and August, 2001. We have used the comet filter set provided by the European Space Agency (ESA) for the ground-based observations of Comet Wirtanen which is the target comet of the Rosetta spacecraft mission. The Rosetta filters have six filters covering four neutral species, CN, C2, C3 and NH2 and two continuum filters for dust emission. As a cooperative effort with the ESA Rosetta Project and Dr. T. Bonev of the Bulgarian Institute of Astronomy (BIA), the NCU group has the responsibility of observing 55 standard stars in the southern sky for the purpose of photometric calibration of the Rosetta filters. In this work we will present basic data for the relative and absolute fluxes of the standard stars we have measured and the preliminary results of the coma profiles of Comet A2. |
